Community List

Community lists define named collections of BGP community values used for route filtering and matching in route maps. NX-OS supports standard community lists (matching exact community values) and regex-based community lists (matching community strings using regular expressions). Community lists are referenced in route map match clauses to implement community-based routing policies.

Diagram

Classes

nxos

Name	Type	Constraint	Mandatory	Default Value
devices	List	devices	No
device_groups	List	device_groups	No
global	Class	global	No
templates	List	templates	No

devices (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

device_groups (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

global (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

templates (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

configuration (nxos.devices)

Name	Type	Constraint	Mandatory	Default Value
community_lists	List	community_lists	No

community_lists (nxos.devices.configuration)

Name	Type	Constraint	Mandatory	Default Value
name	String		Yes
mode	Choice	standard, expanded	No
entries	List	entries	No

entries (nxos.devices.configuration.community_lists)

Name	Type	Constraint	Mandatory	Default Value
seq	Integer	min: 1, max: 4294967294	Yes
action	Choice	permit, deny	No
regex	String		No
communities	List	String	No

Examples

Example 1: Standard community list matching specific community values

nxos:
  devices:
    - name: LEAF1
      configuration:
        community_lists:
          - name: CL-STANDARD-TENANT
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:100"
                  - "regular:as2-nn2:65000:200"
              - seq: 20
                action: deny

Example 2: Regex-based community list for flexible pattern matching

nxos:
  devices:
    - name: SPINE1
      configuration:
        community_lists:
          - name: CL-REGEX-DATACENTER
            mode: expanded
            entries:
              - seq: 10
                action: permit
                regex: "65000:.*"

Example 3: Multiple community lists for a multi-tenant EVPN fabric

nxos:
  devices:
    - name: BORDER-LEAF1
      configuration:
        community_lists:
          - name: CL-TENANT-A
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:1010"
                  - "regular:as2-nn2:65000:1020"
          - name: CL-TENANT-B
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:2010"
                  - "regular:as2-nn2:65000:2020"
          - name: CL-NO-EXPORT
            mode: expanded
            entries:
              - seq: 10
                action: permit
                regex: "no-export"